Automatic safety window and screen lock



. I, D. PILTZ.

E AUTOMATIC SAFETY WINDOW AND SCREEN LOCK.

v APPLICATION FILED SEPT, 25, 1920.

1,389,457. Patented Aug. 3o, 1921. I 2 SHEETSQSHEET I.

FIG. 1 ,It

I akkoznm l. D. PILTZ.

AUTOMATIC SAFETY WINDOW AND SCREEN LOCK. APPLICATION FILED sEPLz, I92o.

1,389,457 Patented Aug. 30,1921, W FIG 3 2 SHEETS-SHEET 2.

PATENT OFFICE.

JOHN D. PILTZ, OF DETROIT, MICHIGAN.

AUTOMATIC `SAFETY WINDOW AND SCREEN LOCK.-

Specification of Letters Patent.

Patented Aug. 30, 1921.

Application filed September 25, 1920. 'Serial No. 412,687.

To @ZZ w 710m t may concern Be it known that I, JOHN D. PTLTZ, a citizen of Poland, residing at Detroit, in the county of Tayne and State of Michigan, have invented certain new and useful Improvements -in Automatic Safety Window and Screen Locks, of which the following is a specification.

This invention relates to certain new and useful improvements in window locking and screen retaining devices and has particular reference to improved means for locking either sashes of a window in partially open position and improved means for retaining a window screen in place when said sashes are thus locked.

The primary object of the invention is to provide means upon a window screen to penetrate the adjacent rail of a sash and the adjacent window frame member, in combination with means for locking the sash against movement away from the screen whereby removal of the latter is prevented.

With the above general objects in view and others that will become apparent as t-he nature ofthe invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings, wherein like reference 'characters indicate corresponding parts throughout the several views,

Figure 1 is a front elevation, partly broken away, of a window frame equipped with the present invention,

Fig. 2 is a vertical sectional view taken upon line II-II of Fig. 1,

Fig. 3 is a transverse sectional view taken upon line III-III of Fig. 2, X

Fig. 4 is a horizontal sectional view on an enlarged scale showing the sash locking mechanism in detail as seen when taking a section upon line IV-IV of Fig. 5,

Fig. 5 is a vertical sectional view taken upon line V-V of Fig. 4.

Fig. 6 is a front elevation of the sash locking device, and

Fig. 7 is a perspective view of the casing of the sash locking device.

Referring more in detail to the several views, the present invention lcontemplates the provision of a rectangular window screen 5 having pins 6 projecting from the top and bottom rails thereof so as to penetrate the bottom rail 7 of the inner window sash 8- and the sill. 9 of the window frame A when said screen is disposed as shown in Figs. 1 and 2. whereby, when the cash 8 is locked in its partially lowered position of Figs. 1 and 2. removal of the screen 5 is prevented from the outside of the dwelling due to the employment of a special form of sash locking device -B shown in detail'in Figs. 4 to 7 inclusive. The invention also contemplates the provision of a similar locking device B for the outer or upper sash 10 to enable the screen to be used between the top rail 11 of the latter sash and the top member 12 of the window frame when the sash 10 is partially lowered.

As the means for locking the sashes 8 and 10 is identical in construction, detail description of one only essary. f

As shown in Figs. 3 to 7 inclusive, the window fra-me is recessed as at 13 so as to enable the casing 14 to be countersunk therein and then` secured in place by nails 15 or the like passing through the apertures' in the iiange 16 of the casing 14 and penetrating the *window frame, said fiange 16 being provided entirely aroundthe margin of the casing at the open side of the latter. The nails 15also secure a cover plate 17 on the open side of the-casing 14, and this cover plate is pro vided with suitable sleeves through which project the locking bolts 18 of the sash locking device. Rollers 19 are provided on the bolts 18 so as to insure against resistance to the bolts when ventering i the transverse grooves 21 provided in the side rail 20 of the sash 8 or 10, which grooves 21 are so disposed that one of the same is positioned to receive the bolts 18 when the sash 8 or 10 is in its proper partially open position to retain the screen 5 against removal. The other groove 21 of each sash is arranged to receive the bolts 18 whentheir respective sash is in its enti-rely closed position.

The bolts 18 are rigid with and project from a reciprocable follower 22 arranged within the casing 14 behind the cover plate of the same is deemed nec 17, and this follower is normally outwardly grooves 26 which slidably receive longitudinal ribs 27 of the casing 14 whereby said follower is additionally guided and supported. A plurality of racks 2S are provided on the follower 22 and each mesh with a freely rotatable spur pinion Q9 supported upon a shaft 30 carried by the lower pair of the ribs 27. These racks and pinions insure posit-ive movement of the follower and act in conjunction with the rollers 3l to act as anti-friction means between the follower and the casing 14, said rollers 3l being journaled on the follower 22 in position to bear upon the top wall of the casing lll as shown in Fig. 5.

A handle 32 is attached to the follower 22 of the mechanism for locking the sash 8, and said handle projects outwardly through the window frame in position to be readily pressed inwardly from within the dwelling so as to release the sash although inaccessible to one outside of the dwelling. A similar handle 32 is provided for the lock mechanism of sash 10 between the sashes 8 and 16 as shown in Fig. n, and the top rail 33 of the sash 8 is cut away in order to allow said rail to pass the handle 32 when said sash 8 is full lowered or closed. lhen sash 8 is fully closed handle 32 may be manipulated from the inside of the dwelling though not from the outside thereof.

It will thus be seen that with the pins 6 penetrating the window frame and the sash as shown in Figs. l and 2 and the sash locked in partially open position, the window screen cannot be removed by an unauthorized person from the outside of a dwelling and the invention therefore is in the naturel of a safety device.

lt is believed that the construction and operation as well as the advantages of the present invention will be readily understood and appreciated by those skilled in the art from the foregoing description.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

`What is claimed as new is zl. A sash locking means including a casing adapted to be countersunlr in a window frame, a spring projected follower reciprocable in said casing and having a pair of bolts extending outwardly therefrom, antifriction rollers ournaled upon the free ends of said bolts, a cover plate for the casing.

having slots through which said bolts slidably project, guiding pins rigidly attached to the back of the casing and slidably extending through said follower, said follower being provided with longitudinal grooves in the upper and lower faces thereof, and longitudinal ribs projecting inwardly from the casing and slidably fitting in said grooves.

2. A sash locking means including a casing adapted to be counter-sunk in a window frame, a spring projected follower reciprocable in said casing and having a pair of bolts extending outwardly therefrom, anti-friction rollers journa-led upon the free ends of said bolts, a cover plate for the casing having slots through which said bolts sildably project, guiding pins rigidly attached to the back of the casing and slidably extending through said follower, said follower being provided with longitudinal grooves in the upper and lower faces thereof, and

longitudinal ribs projecting inwardly from the casing and slidably fitting in said grooves, said follower Ahaving a plurality of racks formed on its under side, pinions meshing with said racks, and a shaft supported by the lower longitudinal ribs of the casing and upon `which said pinions are j ournaled.

A sash locking means including a casing adapted to be countersunk in a window frame, a spring projected follower reciprocable in said casing and having a pair of' bolts extending outwardly therefrom, antifriction rollers journaled upon the free ends of said bolts, a cover plate for the casing having slots through which said bolts slidably project, guiding pinsrigidly attached to the'back of the casing and slidably extending through said fo-llower, said follower being provided with longitudinal grooves in the upper and lower faces thereof, longitudinal ribs projecting inwardly fromthe casing and slidably fitting in said grooves, said follower having a plurality of racks formed on its under side, pinions meshing with said racks, a shaft supported by the lower longitudinal ribs of the casing` and upon which said pinions are journaled, and anti-friction rollers carried by the lfollower and engagin the inner surface of the casing.

In testimony whereof I affix my signature.

JOHN D. PILTZ.

vWitnesses l STANLEY A. JANKowsKI, MATT MA'rEoKL 

